from flask import g
from flask import request

from info import redis_store
from info.models import User, News, Category
from info.utils.commons import user_login_data
from info.utils.response_code import RET
from . import index_blu
from flask import render_template,current_app,session, jsonify

# 功能描述：首页新闻列表展示
# 请求路径: /newslist
# 请求方式: GET
# 请求参数: cid,page,per_page
# 返回值: data数据
@index_blu.route('/newslist')
def news_list():
    """
    思路分析
    1.获取参数
    2.校验参数，参数类型转换
    3.分页查询，用paginate
    4.获取到分页对象属性，总页数，当前页，当前页对象
    5.将新闻对象列表转成字典列表
    6.返回响应，携带数据
    """

    # 1.获取参数
    cid = request.args.get('cid')
    page = request.args.get('page',1)    #获取不到默认值是1
    pre_page = request.args.get('pre_page',10)

    # 2.校验参数，参数类型转换
    try:
        page = int(page)
        pre_page = int(pre_page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1
        pre_page= 10

    # 3.分页查询，用paginate
    try:
        filters=[]
        if cid != "1":
            filters.append(News.category_id==cid)

        paginate=News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,pre_page,False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="获取新闻失败")

    # 4.获取到分页对象属性，总页数，当前页，当前页对象
    totalPages =paginate.pages
    currentpages =paginate.page
    items = paginate.items

    # 5.将新闻对象列表转成字典列表
    newsList=[]
    for news in items:
        newsList.append(news.to_dict())

    # 6.返回响应，携带数据
    return jsonify(errno=RET.OK,errmsg="查询成功",newsList=newsList,totalPages=totalPages,currentpages=currentpages)


# 首页内容
@index_blu.route('/',methods=['GET','POST'])
@user_login_data
def show_index_page():

    # # 获取session中的用户信息
    # user_id = session.get('user_id')
    #
    # # 获取用户对象
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    # 查询热门新闻前十条
    try:
        news_list =News.query.order_by(News.clicks.desc()).limit(10).all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="新闻查询失败")

    # 将新闻对象列表转成字典列表
    click_news_list = []
    for news in news_list:
        click_news_list.append(news.to_dict())

    # 查询分类数据
    try:
        categories = Category.query.all()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="分类查询失败")

    # 将分类对象列表转成字典列表
    category_list =[]
    for category in categories:
        category_list.append(category.to_dict())


    data = {
            # 判断user如果有值，返回左边，否则返回右边
        "user_info":g.user.to_dict() if g.user else "",
        "click_news_list":click_news_list,
        "categories":category_list
    }

    return render_template('/news/index.html', data=data)

# 浏览器在访问每个网站的时候，都会发送一个Get请求，向/favicon.ico地址获取logo
# app中提供了方法send_static_file,会自动寻找static静态文件下的资源
@index_blu.route('/favicon.ico')
def get_web_logo():
    return  current_app.send_static_file('/news/favicon.ico')